Revit supports the Autodesk i-drop® drag-and-drop feature. When i-drop objects are pulled from an i-drop–enabled web page, Revit downloads the file and imports it as if it were pulled from a local file.
When you drag-and-drop a file, the file is imported with the default settings. If you want to use different settings (for example, Manual - Origin rather than Auto - Center to Center), import the file using the Import CAD tool. (See Import or Link CAD Files.)
To import CAD files using i-drop